// @param allowGreaterDistance whether or not the robot is allowed to move further away in moving
// toward
public Direction moveToward(MapLocation location, Boolean allowGreaterDistance)
throws GameActionException {
if (location == null) return null;
MapLocation currentLocation = this.robot.locationController.currentLocation();
double currentDistance = currentLocation.distanceSquaredTo(location);
Direction direction = this.robot.robotController.getLocation().directionTo(location);
int directionInteger = directionToInt(direction);
int[] offsets = {0, 1, -1, 2, -2};
for (int offset : offsets) {
direction = MovementController.directionFromInt(directionInteger + offset);
MapLocation moveLocation = currentLocation.add(direction);
if (!allowGreaterDistance && moveLocation.distanceSquaredTo(location) > currentDistance)
continue;
if (this.moveTo(direction)) {
return direction;
}
}
return null;
}
public Direction moveToward(MapLocation location, Boolean allowGreaterDistance, int[] offsets)
throws GameActionException {
if (location == null) return null;
MapLocation currentLocation = this.robot.locationController.currentLocation();
double currentDistance = currentLocation.distanceSquaredTo(location);
Direction direction = currentLocation.directionTo(location);
int directionInteger = directionToInt(direction);
if (this.actualLastPosition != null
&& currentLocation.distanceSquaredTo(this.actualLastPosition) <= 1) this.turnsStuck++;
if (this.turnsStuck > 1) return this.moveAroundObstacleToward(location);
if (moveTo(direction)) {
this.actualLastPosition = currentLocation;
return direction;
} else {
for (int offset : offsets) {
Direction directionOne = MovementController.directionFromInt(directionInteger + offset);
Direction directionTwo = MovementController.directionFromInt(directionInteger - offset);
direction =
this.moveTowardDirections(
currentLocation,
location,
directionOne,
directionTwo,
allowGreaterDistance,
currentDistance);
if (direction != null) {
this.actualLastPosition = currentLocation;
return direction;
}
}
}
this.turnsStuck++;
return null;
}
// moves away from a location using the moveTo method (and its implications)
public Direction moveAway(MapLocation location) throws GameActionException {
if (location == null) return null;
MapLocation currentLocation = this.robot.locationController.currentLocation();
Direction direction = currentLocation.directionTo(location);
return this.moveToward(
currentLocation.add(MovementController.directionWithOffset(direction, -4)));
}
public Direction moveAway(RobotInfo[] enemies) throws GameActionException {
MapLocation currentLocation = this.robot.locationController.currentLocation();
Direction opposite = null;
for (RobotInfo enemy : enemies) {
opposite =
MovementController.directionWithOffset(currentLocation.directionTo(enemy.location), -4);
break;
}
return this.moveToward(currentLocation.add(opposite, 40));
}
public Direction moveAway(RobotInfo[] enemies) throws GameActionException {
MapLocation currentLocation = this.robot.locationController.currentLocation();
RobotInfo closestEnemy = null;
double closestDistance = Double.MAX_VALUE;
for (RobotInfo enemy : enemies) {
double distance = currentLocation.distanceSquaredTo(enemy.location);
if (distance < closestDistance) {
closestEnemy = enemy;
closestDistance = distance;
}
}
Direction opposite =
MovementController.directionWithOffset(
currentLocation.directionTo(closestEnemy.location), -4);
return this.moveToward(currentLocation.add(opposite, 40));
}
public static Direction directionWithOffset(Direction direction, int offset) {
return MovementController.directionFromInt(
MovementController.directionToInt(direction) + offset);
}
// follows a wall until it can move towards it's initial target, switching directions if it gets
// stuck
public Direction moveAroundObstacleToward(MapLocation location) throws GameActionException {
if (this.traversalDirection == 0) { // start with a random traversal direction
if (this.robot.random.nextBoolean()) this.traversalDirection = -1;
else this.traversalDirection = 1;
}
MapLocation robotLocation = this.robot.locationController.currentLocation();
this.actualLastPosition = robotLocation;
Direction directionToTarget = robotLocation.directionTo(location);
Direction directionToLastPosition =
this.lastPosition != null ? robotLocation.directionTo(this.lastPosition) : null;
int switchedDirection = 0;
this.robot.robotController.setIndicatorString(
2,
"Traversal Direction "
+ this.traversalDirection
+ " Dir to target "
+ directionToTarget
+ " Dir to LP "
+ directionToLastPosition);
// see if it can move toward it's target
if (directionToTarget == directionToLastPosition || !this.moveTo(directionToTarget)) {
if (this.lastLastPosition != null
&& robotLocation.distanceSquaredTo(this.lastLastPosition) <= 1
&& this.turnsStuckWhilePathfinding == 0) { // if just moved in a triangle
this.traversalDirection = -this.traversalDirection;
}
this.robot.robotController.setIndicatorString(2, "I CAN'T move towards target");
// traverse along obstacle, switching directions if it hits a loop around or outer wall
for (int i = 1; i < 8 && switchedDirection <= 1; i++) {
Direction direction =
MovementController.directionWithOffset(directionToTarget, i * this.traversalDirection);
MapLocation nextLocation = robotLocation.add(direction);
this.robot.robotController.setIndicatorDot(nextLocation, 255, 255, 255);
if (!direction.equals(directionToLastPosition) || this.turnsStuckWhilePathfinding > 1) {
if (this.robot.movementController.moveTo(direction)) {
this.lastLastPosition = this.lastPosition;
this.lastPosition = robotLocation;
if (this.turnsStuckWhilePathfinding > 0) this.turnsStuckWhilePathfinding -= 1;
return direction;
} else {
if (this.robot
.robotController
.senseTerrainTile(nextLocation)
.equals(TerrainTile.OFF_MAP)) {
this.traversalDirection =
-this
.traversalDirection; // Might need to do additional checks if this switches
// too often
i = 0;
switchedDirection++;
}
}
}
}
// check if didn't move (dead end)
if (robotLocation.equals(this.actualLastPosition)) {
this.turnsStuckWhilePathfinding++;
}
} else {
this.robot.robotController.setIndicatorString(2, "I can move towards target");
this.robot.robotController.setIndicatorLine(robotLocation, location, 255, 255, 255);
this.turnsStuck = 0;
return directionToTarget;
}
// System.out.println("Didn't find move location.");
return null;
}